Int J Biomed Imaging
October 2022
This article explores how six Pakistani Muslim women interpret cultural concepts of izzat (honor and self-respect); what role, if any, it has in their lives; and whether there is interplay between upholding izzat and the participants' help-seeking strategies for mental health and well-being. Semistructured interviews were conducted and analyzed with an interpretative phenomenological analytic framework. Three themes were identified: (a) "the rules of izzat," (b) "negotiating tensions," and (c) "speaking out/breaking the 'rules.
View Article and Find Full Text PDFBackground: Cognitive strategies are a set of psychologic behaviors used to modulate one's perception or interpretation of a sensation or situation. Although the effectiveness of each cognitive strategy seems to differ between individuals, they are commonly used clinically to help patients with chronic pain cope with their condition. The neural basis of commonly used cognitive strategies is not well understood.
View Article and Find Full Text PDFOne of the strong trends in medical education today is the integration of the humanities into the basic medical curriculum. The anatomy program is an obvious choice for using the humanities to develop professionalism and ethical values. They can also be used to develop close observational skills.
View Article and Find Full Text PDFPrevious literature has reported a wide range of anatomical correlates when participants are required to perform a visuomotor adaptation task. However, traditional adaptation tasks suffer a number of inherent limitations that may, in part, give rise to this variability. For instance, the sparse visual environment does not map well onto conditions in which a visuomotor transformation would normally be required in everyday life.
View Article and Find Full Text PDFFunctional magnetic resonance imaging (fMRI) is a non-invasive neuroimaging tool that indirectly identifies areas of neural activity in the brain and more recently has been applied to the adult spinal cord (spinal fMRI). Spinal fMRI could clearly benefit pediatric populations as well. The purpose of this work was to characterize the response observed with spinal fMRI in the brainstem and cervical (C) spinal cord of awake, healthy children during thermal stimulation (17°C and 27°C) applied to the right hand.
View Article and Find Full Text PDFThe development of noninvasive neuroimaging techniques, such as fMRI, has rapidly advanced our understanding of the neural systems underlying the integration of visual and motor information. However, the fMRI experimental design is restricted by several environmental elements, such as the presence of the magnetic field and the restricted view of the participant, making it difficult to monitor and measure behaviour. The present article describes a novel, specialized software package developed in our laboratory called Biometric Integration Recording and Analysis (BIRA).
View Article and Find Full Text PDFPurpose: To use spinal cord diffusion tensor imaging (DTI) for investigating human cervical funiculi, acquire axial diffusion magnetic resonance imaging (MRI) data with an in-plane resolution sufficient to delineate subquadrants within the spinal cord, obtain corresponding DTI metrics, and assess potential regional differences.
Materials And Methods: Healthy volunteers were studied with a 3 T Siemens Trio MRI scanner. DTI data were acquired using a single-shot spin echo EPI sequence.
Rapidly developing, non-invasive, neuroimaging methods provide increasingly detailed structural and functional information about the nervous system, helping advance our understanding of pain processing, chronic pain conditions and the mechanisms of analgesia. However, effective treatment for many chronic pain conditions remains a large, unmet medical need. Neuroimaging techniques may enhance our understanding of why currently available analgesics are ineffective for so many patients and aid in identifying new neural targets for pharmacological interventions of pain.
View Article and Find Full Text PDFIntroduction: We investigated noninvasively areas of the healthy human spinal cord that become active in response to vibration stimulation of different dermatomes using functional magnetic resonance imaging (fMRI). The objectives of this study were to: (1) examine the patterns of consistent activity in the spinal cord during vibration stimulation of the skin, and (2) investigate the rostrocaudal distribution of active pixels when stimulation was applied to different dermatomes.
Methods: FMRI of the cervical and lumbar spinal cord of seven healthy human subjects was carried out during vibration stimulation of six different dermatomes.
Patterns of neuronal activity in the spinal cord using functional magnetic resonance imaging during noxious (48 degrees C) and innocuous (40 degrees C) thermal stimulation of the rat forepaw were examined. The patterns of functional activity elicited by thermal stimuli were compared in alpha-chloralose- and halothane-anesthetized rats. Although the locations of active pixels were similar during both types of stimulation, the mean percentage signal change was higher during noxious stimulation in both anesthetic groups.
View Article and Find Full Text PDFAlpha-chloralose is commonly used during animal fMRI studies for anesthesia, however, recovery of animals is difficult, limiting experimental design. The use of a less invasive anesthetic would enable chronic experiments. The present study compares functional activity in the spinal cord of the alpha-chloralose and halothane-anesthetized rat.
View Article and Find Full Text PDFFunctional magnetic resonance imaging based on a non-BOLD-contrast mechanism, which we have termed "SEEP" (Signal Enhancement by Extravascular water Protons), has previously been demonstrated. Here the reproducibility of areas of activity identified with both SEEP and BOLD contrast is assessed in duplicate experiments in healthy volunteers, with relatively high resolution (1.6 mm) image data at 1.
View Article and Find Full Text PDFPurpose: To develop a spinal functional MRI (fMRI) method with three-dimensional coverage of a large extent of the spinal cord with minimal partial volume effects
Materials And Methods: fMRI data of the cervical spinal cord were obtained at 1.5 T with a single-shot fast spin-echo imaging method, from thin contiguous sagittal slices spanning the cord. Thermal stimulation was applied to the palm of the hand in a block pattern with 15 degrees C for stimulation and 32 degrees C during baseline periods.
The relationship between neuronal activity in the rat cervical and lumbar spinal cord was examined using functional magnetic resonance imaging (fMRI) and immunohistochemistry. Neuronal activity determined by c-fos staining was greatest between L4 and L6, and C5 to C7 spinal cord segments during noxious electrical stimulation of the rat hindpaw and forepaw, respectively. Areas of activity determined by fMRI are consistent with spinal cord physiology, and are predominantly found in regions of the spinal cord associated with pain, namely the dorsal horn.
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